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Studies of fabrication of Perfect Photonic Band Crystals and Optics of the Photonic Crystals by using Innovative High Refractive Index Materials and Advanced Self-assembly

利用创新高折射率材料和先进自组装技术制造完美光子带晶体和光子晶体光学的研究

基本信息

批准号：
23750152
负责人：
SOGOSHI Norihito
金额：
$ 3万
依托单位：
The University of Electro-Communications
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (B)
财政年份：
2011
资助国家：
日本
起止时间：
2011 至 2012
项目状态：
已结题

项目摘要

We studied the inverse opal photonic structure made of high refractive index above 3.0. The perfect photonic stop band was observed, and is applicable to innovative photonic devices.The artificial opals, which are obtained by arraying colloidal particles with well-defined diameters, are the possible candidate of perfect photonic crystals. The interstitial voids were filled with high-refractive index materials using the inverse opal method improved by us. This method allows us to fabricate virtually any kind of materials tobe filled in the template artificial opals.We made several trials to deposit the inverse opals with metal oxide with a high refractive index.The one is the electrodeposition from electrolyte solution containing desired metal cations onto the electrode with the artificial opal structure. The deposited inverse opalline film composed of Cu2O with as highrefractive index as above 3 was obtained. We confirmed the well developed photonic band gap occurred in this film.The r … More esult remains preliminary, but reveals the high refractive index inverse opals are promising. The future result will be the ones applicable to photonic devices.Another trials was to deposit the film from metal-alchoxide solutions using dehydrosys reactions. This method is highly desirable since the nearly arbitrary combination of metal-oxides enables the design fascility. This approach is promising, and yet to be studied.The photonic structure obtained by the first approach showed the wide photonic stop band of longer than 100 nm, and the extinction ratio more than 100, when the transmittance inside and outside the stop band was compared.As the parallel project, we studied the colloidal particle mixed with discotic liquid crystals, which exhibits the hierarchy self-assemble architecture. The purpose of this study is aligned nanowire constructed in host semiconducting organic materials.A chain composed of Au nanoparticles are aligned with self-ordering discotic liquid crystals. The photo-induced charge transfer from semiconducting liquid crystalline molecule HAT6 to Au nanowire was observed. This results indicate the efficient charge separation using nanowire as a nano-comb electrode is promising.The results were reported on the annual conference of the Japanese Society of Chemistry on the lastMarch. Less

研究了由高折射率材料制成的反蛋白石光子晶体结构。通过排列具有特定直径的胶体粒子得到的人工蛋白石是理想光子晶体的候选材料。采用我们改进的反蛋白石法，用高折射率材料填充间隙空隙。我们进行了几次存款高折射率金属氧化物反蛋白石的实验，一次是在含有所需金属阳离子的电解质溶液中电沉积到具有人工蛋白石结构的电极上，另一次是在具有人工蛋白石结构的电极上电沉积金属氧化物反蛋白石。沉积的反乳白色薄膜由Cu_2O组成，具有3以上的高折射率。我们证实了这种薄膜具有很好的光子带隙， ...更多信息结果仍然是初步的，但揭示了高折射率反蛋白石是有前途的。另一个尝试是利用脱氢反应从金属醇溶液中存款薄膜。这种方法是非常可取的，因为几乎任意组合的金属氧化物，使设计fascility。这种方法具有很好的应用前景，但还有待进一步研究，第一种方法得到的光子晶体结构具有大于100 nm的宽光子阻带，并且通过比较阻带内外的透射率，消光比大于100。本研究的目的是在半导体有机材料中构建定向纳米线，由Au纳米颗粒组成的链与自序无序液晶定向排列。观察到半导体液晶分子HAT 6向Au纳米线的光诱导电荷转移。这一结果表明，利用纳米线作为纳米梳电极进行有效的电荷分离是有希望的。少